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11-17-2017, 05:43 PM
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#1 |
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Registered User
 Join Date: Jun 2015
Location: Springville, IN
Posts: 7
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Lower Control Arm U-Bolt size
I strugged to find this info, so posting it here.
Control Arm U-Bolt Center to Center 2.13" Control Arm U-Bolt Length 3.44" Control Arm U-Bolt Thread Size 9/16"-12 UNC-2A
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1969 Chevrolet C20 Longbed I-6 250, SM465 |
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11-17-2017, 06:26 PM
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#2 |
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Senior Member
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Lower Control Arm U-Bolt size
Stock is 1/2" if I remember right ,While you have them apart upgrade to Dorman 13503 which are 9/16 .
 https://www.summitracing.com/parts/r...SABEgKJvvD_BwE |
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11-17-2017, 07:12 PM
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#3 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: Lower Control Arm U-Bolt size
I used the 9/16" Dorman U-bolts listed above and didn't even have to drill out the holes in the Crossmember for them to fit. Great upgrade for cheap!
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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11-17-2017, 07:27 PM
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#4 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: Lower Control Arm U-Bolt size
I also used the bigger 9/16 bolts. Also available from gm p/n 345970 (9/16-12x 3 5/32). I am not a big fan of dorman stuff.
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68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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11-17-2017, 11:07 PM
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#5 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,698
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Re: Lower Control Arm U-Bolt size
I had the 9/16" bolts stock. I know it was original, because it still had the riveted ball joints at 210k miles.
 I'll bet that the truck lost 20 pounds of dirt and grease when I rebuilt that front end.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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